A64L(3) BSD Library Functions Manual A64L(3)NAME
a64l, l64a, l64a_r — convert between a long integer and a base-64 ASCII
string
LIBRARY
Standard C Library (libc, -lc)
SYNOPSIS
#include <stdlib.h>
long
a64l(const char *s);
char *
l64a(long int l);
int
l64a_r(long int l, char *buffer, int buflen);
DESCRIPTION
The a64l() and l64a() functions convert between a long integer and its
base-64 ASCII string representation.
The characters used to represent ``digits'' are `.' for 0, `/' for 1, `0'
- `9' for 2 - 11, `A' - `Z' for 12 - 37, and `a' - `z' for 38 - 63.
a64l() takes a pointer to a NUL-terminated base-64 ASCII string represen‐
tation, s, and returns the corresponding long integer value.
l64a() takes a long integer value, l, and returns a pointer to the corre‐
sponding NUL-terminated base-64 ASCII string representation.
l64a_r() performs a conversion identical to that of l64a() and stores the
resulting representation in the memory area pointed to by buffer, consum‐
ing at most buflen characters including the terminating NUL character.
RETURN VALUES
On successful completion, a64l() returns the long integer value corre‐
sponding to the input string. If the string pointed to by s is an empty
string, a64l() returns a value of 0L.
l64a() returns a pointer to the base-64 ASCII string representation cor‐
responding to the input value. If l is 0L, l64a() returns a pointer to
an empty string.
On successful completion, l64a_r() returns 0; if buffer is of insuffi‐
cient length, -1 is returned.
SEE ALSOstrtol(3)STANDARDS
The a64l() and l64a() functions conform to X/Open Portability Guide
Issue 4, Version 2 (“XPG4.2”) and IEEE Std 1003.1-2004 (“POSIX.1”). The
l64a_r() function conforms to System V Interface Definition, Fourth
Edition (“SVID4”), Multithreading Extension.
BUGS
The l64a() function is not reentrant. The value returned by it points
into a static buffer area; subsequent calls to la64a() may overwrite this
buffer. In multi-threaded applications, l64a_r() should be used instead.
BSD May 6, 2010 BSD
